German cockroaches favor warm, humid spaces near food and water — kitchens, behind appliances, under sinks — and Vallecito's an inland valley climate far hotter in summer and foggier in winter than California's coastal regions keeps them active most of the year. American cockroaches, larger and reddish-brown, prefer basements, drains, and utility rooms. Housing spans historic agricultural-town homes to newer suburban subdivisions around the valley's larger cities.
We start with an inspection to identify the species and the source — sanitation issue, moisture problem, or entry point. Treatment centers on gel bait placed in cracks, voids, and under appliances, not broadcast spraying, since German cockroaches in particular have developed resistance to many surface sprays. A follow-up visit confirms the bait is working and the population is dropping.